Access method and device

Abstract

An access method and a device are provided. The access method is applied to a first wireless backhaul node and includes: determining a previous hop node of the first wireless backhaul node, the previous hop node being a home donor base station of the first wireless backhaul node or being a second wireless backhaul node; and transmitting first information to the home donor base station directly or transmitting the first information to the home donor base station via the second wireless backhaul node.

What is claimed is: 
     
       1. An access method, effected by a wireless backhaul node, comprising:
 determining an upper-layer parent node of the wireless backhaul node in a wireless backhaul path from a donor base station to the wireless backhaul node, wherein the upper-layer parent node is the donor base station of the wireless backhaul node or is an intermediate wireless backhaul node in the wireless backhaul path; and 
 transmitting first information to the donor base station directly or transmitting the first information to the donor base station via the intermediate wireless backhaul node; 
 wherein the first information comprises identity information of the wireless backhaul node and/or operating mode information of the wireless backhaul node. 
 
     
     
       2. The access method according to  claim 1 , wherein the first information is transmitted to the donor base station directly through one the following messages:
 Msg1 of a random access procedure; 
 a radio resource control (RRC) connection establishment request message; 
 an RRC connection establishment completion message; 
 a predefined message dedicated to report of identity characteristics information; 
 other uplink messages. 
 
     
     
       3. The access method according to  claim 1 , wherein the operating mode information of the wireless backhaul node comprises one or a combination of:
 indication information indicating that the wireless backhaul node operates in a Layer 3 mode or Layer 2 mode; 
 indication information indicating that the wireless backhaul node is visible or invisible to a predetermined node, wherein the predetermined node comprises a core network node and/or a radio access network (RAN) side node other than the wireless backhaul node; 
 indication information indicating that the wireless backhaul node operates in a fifth-generation (5G) cell mode or distributed unit (DU) mode; and 
 indication information indicating two operating modes supported by the wireless backhaul node simultaneously. 
 
     
     
       4. The access method according to  claim 3 , wherein subsequent to transmitting the first information, the method further comprises:
 if an operating mode of the wireless backhaul node is the Layer 3 mode or is visible to the predetermined node or is the 5G cell mode, initiating, by the wireless backhaul node, an Ng interface setup process and an Xn interface setup process with the donor base station; 
 and/or, 
 if an operating mode of the wireless backhaul node is the Layer 2 mode or is invisible to the predetermined node or is the DU mode, initiating, by the wireless backhaul node, an F1 interface setup process with the donor base station. 
 
     
     
       5. The access method according to  claim 1 , wherein the determining the upper-layer parent node of the wireless backhaul node comprises:
 determining a range of selectable cells based on pre-acquired relevant node information on a node configured to provide a wireless backhaul service, wherein the relevant node information comprises at least one of: a donor base station identifier, donor base station cell list information, a wireless backhaul node identifier, wireless backhaul node cell list information; and 
 selecting, based on signal qualities of searched cells, a cell satisfying predefined conditions from the range of selectable cells and accessing the cell, wherein the upper-layer parent node is a donor base station or a wireless backhaul node that the accessed cell belongs to. 
 
     
     
       6. The access method according to  claim 5 , wherein the relevant node information further comprises a type of wireless backhaul service supported by a cell, and types of the wireless backhaul service comprise a Layer 2 wireless backhaul service and a Layer 3 wireless backhaul service. 
     
     
       7. The access method according to  claim 6 , wherein the predefined conditions comprise at least one of following conditions: the cell is configured to provide a wireless backhaul service corresponding to the operating mode of the wireless backhaul node, a quality of a link from the cell to the wireless backhaul node satisfies a predefined requirement, and the cell allows access by a new wireless backhaul node. 
     
     
       8. The access method according to  claim 5 , wherein prior to determining the wireless backhaul node, the method further comprises:
 transmitting, by the wireless backhaul node, a request message to an operation, administration, and maintenance (OAM) function entity of a core network, and receiving, by the wireless backhaul node, relevant node information on a node configured to provide a wireless backhaul service that is returned from the OAM function entity based on the request message. 
 
     
     
       9. The access method according to  claim 5 , wherein the transmitting the first information to the donor base station via the intermediate wireless backhaul node comprises:
 transmitting, by the wireless backhaul node, the first information over a path and bearer already established between the intermediate wireless backhaul node and the donor base station; or 
 triggering, by the wireless backhaul node, an establishment of a path and bearer between the intermediate wireless backhaul node and the donor base station and transmitting, by the wireless backhaul node, the first information over the newly established path and bearer. 
 
     
     
       10. A wireless backhaul node, comprising a transceiver, a storage, a processor and a program stored in the storage and configured to be executed by the processor, wherein
 the processor is configured to read the program from the storage to perform following process: determining an upper-layer parent node of the wireless backhaul node in a wireless backhaul path from a donor base station to the wireless backhaul node, wherein the upper-layer parent node is the donor base station of the wireless backhaul node or is an intermediate wireless backhaul node in the wireless backhaul path; 
 the transceiver is configured to transmit first information to the donor base station directly or transmit the first information to the donor base station via the intermediate wireless backhaul node; 
 wherein the first information comprises identity information of the wireless backhaul node and/or operating mode information of the wireless backhaul node. 
 
     
     
       11. The wireless backhaul node according to  claim 10 , wherein
 the transceiver is further configured to transmit the first information to the donor base station directly through one of following messages: 
 Msg1 of a random access procedure; 
 a radio resource control (RRC) connection establishment request message; 
 an RRC connection establishment completion message; 
 a predefined message dedicated to report of identity characteristics information; 
 other uplink messages. 
 
     
     
       12. The wireless backhaul node according to  claim 10 , wherein the operating mode information of the wireless backhaul node comprises one or a combination of:
 indication information indicating that the wireless backhaul node operates in a Layer 3 mode or Layer 2 mode; 
 indication information indicating that the wireless backhaul node is visible or invisible to a predetermined node, wherein the predetermined node comprises a core network node and/or a radio access network (RAN) side node other than the wireless backhaul node; 
 indication information indicating that the wireless backhaul node operates in a fifth-generation (5G) cell mode or distributed unit (DU) mode; and 
 indication information indicating two operating modes supported by the wireless backhaul node simultaneously. 
 
     
     
       13. A non-transitory computer readable storage medium storing therein a computer program, wherein the computer program is configured to be executed by a processor to implement operations of the access method according to  claim 1 .